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XScreenSaver(1)						       XScreenSaver(1)

       bubbles - frying pan / soft drink simulation

       bubbles [-display host:display.screen] [-foreground color] [-background
       color] [-window] [-root] [-mono] [-install] [-visual visual]  [-simple]
       [-broken] [-3D] [-file filename] [-directory directoryname]

       Bubbles	sprays lots of little random bubbles all over the window which
       then grow until they reach their maximum size and go pop.  The inspira‐
       tion  for  this	was watching little globules of oil on the bottom of a
       frying pan and it also looks a little like bubbles in fizzy soft drink.
       The default mode uses fancy ray-traced bubbles but there is also a mode
       which just draws circles in case the default mode is too taxing on your

       Depending  on  how  your bubbles was compiled, it accepts the following

	       Colour of circles if -simple mode is selected.

	       Colour of window background.

       -window Draw on a newly-created window.	This is the default.

       -root   Draw on the root window.

       -mono   If on a color display, pretend we're on a monochrome display.

	       Install a private colormap for the window.

       -visual visual
	       Specify which visual to use.  Legal values are the  name	 of  a
	       visual  class,  or the id number (decimal or hex) of a specific

       -delay microseconds
	       How much of a delay should be introduced between steps  of  the
	       animation.   Default 1, or about 1 microsecond.	Actually, this
	       is the delay between each group of 15 new bubbles since such  a
	       delay between each step results in a very slow animation rate.

	       Same as -delay 0.

       -simple Don't  use the default fancy pixmap bubbles.  Just draw circles
	       instead.	 This may give more bearable performance if your hard‐
	       ware wasn't made for this sort of thing.

       -broken Don't hide bubbles when they pop.  This was a bug during devel‐
	       opment but the results were actually quite  attractive.	 (This
	       option  is only available if you have the XPM library available
	       and the imake generated Makefile has defined HAVE_XPM).

       -3D     Normally, the simulation is done completely in two  dimensions.
	       When a bubble swallows up another bubble, the areas of each are
	       added to get the area of the  resulting	bubble.	  This	option
	       changes	the algorithm to instead add volume (imagining each to
	       be a sphere in 3D space).  The whole thing looks more realistic
	       but I find it attracts attention to the flickering of each bub‐
	       ble as they are move and are redrawn.  Your mileage may vary.

       -file filename
	       Use the pixmap definitions in the given file,  instead  of  the
	       default (if one is compiled in).	 This is ignored if -simple is
	       specified.  If the file is compressed (either with compress  or
	       gzip),  it is decompressed before use.  (This option only works
	       if you have XPM compiled into your binary and you have compiled
	       with BUBBLES_IO set in bubbles.h.  This is not the default).

       -directory directoryname
	       Similar	to  -file  except  the file is taken randomly from the
	       contents of the specified directory.  (Again,  this  option  is
	       only available if you have XPM and BUBBLES_IO was set when com‐
	       piling.	See above).

       -quiet  Don't print messages explaining why one or several command line
	       options were ignored.  This is disabled by default.

       If you find the pace of things too slow, remember that there is a delay
       even though you specify no -delay option.  Try using -nodelay  although
       beware  of  the	effects	 of  irritation	 of other users if you're on a
       shared system as you bleed their CPU time away.

       Some tools to assist in creation of new bubbles	are  included  in  the
       source  distribution.   These  can  either  be loaded with the -file or
       -directory options (if available) or they can be used in place  of  the
       distributed  default bubble (bubble_default.c).	You might like to copy
       these scripts  to  a  permanent	location  and  use  them.   Read  bub‐

       Rendered	 bubbles  are  not  supported on monochrome displays.  I'm not
       convinced that small bubbles, even dithered properly are going to  look
       like anything more than a jumble of random dots.

       There is a delay before something appears on the screen when using ren‐
       dered bubbles.  The XPM library seems to	 take  a  long	time  to  make
       pixmaps out of raw data.	 This can be irritating on slower systems.

       The movement of the bubbles looks jerky if an incomplete set of bubbles
       is used.

       The hide/display algorithm could do with some work to avoid  flickering
       when -nodelay is set.

       DISPLAY to get the default host and display number.

	       to  get	the  name of a resource file that overrides the global
	       resources stored in the RESOURCE_MANAGER property.

       X(1), xscreensaver(1)

       This work is Copyright © 1995, 1996 by James Macnicol.	Permission  to
       use,  copy, modify, distribute, and sell this software and its documen‐
       tation for any purpose is hereby granted without fee, provided that the
       above  copyright	 notice	 appear in all copies and that both that copy‐
       right notice and this permission notice appear in supporting documenta‐
       tion.   No representations are made about the suitability of this soft‐
       ware for any purpose.  It  is  provided	"as  is"  without  express  or
       implied warranty.

       James Macnicol <james.macnicol@mailexcite.com>

X Version 11			   14-Dec-95		       XScreenSaver(1)

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